The game crashes when you go to the Knights of Ludd Singularity system:
Spoiler
7553646 [Thread-2] ERROR com.fs.starfarer.combat.CombatMain - java.lang.ClassCastException: class com.fs.starfarer.campaign.BaseLocation$LocationToken cannot be cast to class com.fs.starfarer.campaign.fleet.CampaignFleet (com.fs.starfarer.campaign.BaseLocation$LocationToken and com.fs.starfarer.campaign.fleet.CampaignFleet are in unnamed module of loader 'app')
java.lang.ClassCastException: class com.fs.starfarer.campaign.BaseLocation$LocationToken cannot be cast to class com.fs.starfarer.campaign.fleet.CampaignFleet (com.fs.starfarer.campaign.BaseLocation$LocationToken and com.fs.starfarer.campaign.fleet.CampaignFleet are in unnamed module of loader 'app')
at com.fs.starfarer.campaign.CircularFleetOrbit.setEntity(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.campaign.BaseLocation$LocationToken.setOrbit(Unknown Source) ~[port_obf.jar:?]
at fleetjour.scripts.objects.JournalEntry.makeDoubleWithSameOrbit(JournalEntry.kt:56) ~[?:?]
at fleetjour.scripts.objects.JournalEntry.<init>(JournalEntry.kt:29) ~[?:?]
at fleetjour.scripts.EntryWriter.writeQuickEntry(EntryWriter.kt:209) ~[?:?]
at fleetjour.scripts.AutoWriterScript.reportEntityDiscovered(AutoWriterScript.kt:34) ~[?:?]
at com.fs.starfarer.api.campaign.listeners.ListenerUtil.reportEntityDiscovered(ListenerUtil.java:130) ~[starfarer.api.jar:?]
at com.fs.starfarer.api.campaign.listeners.CoreDiscoverEntityPlugin.discoverEntity(CoreDiscoverEntityPlugin.java:47) ~[starfarer.api.jar:?]
at com.fs.starfarer.campaign.SensorContactIndicatorManager.advance(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.campaign.BaseCampaignEntity.advance(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.campaign.fleet.CampaignFleet.advance(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.campaign.BaseLocation.advance(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.campaign.StarSystem.advance(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.campaign.CampaignEngine.advance(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.campaign.CampaignState.advance(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.BaseGameState.traverse(Unknown Source) ~[port_obf.jar:?]
at com.fs.state.AppDriver.begin(Unknown Source) ~[port.common_obf.jar:?]
at com.fs.starfarer.combat.CombatMain.main(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.StarfarerLauncher.super(Unknown Source) ~[port_obf.jar:?]
at com.fs.starfarer.StarfarerLauncher$1.run(Unknown Source) ~[port_obf.jar:?]
at java.base/java.lang.Thread.run(Thread.java:1575) [?:?]